"To people on HN it's a huge plus, but to real world users..."
I think the opposite. If HN readers tastes' are similar to the average founder in the Valley, they are vastly more likely to use Macs and iPhones together than the average real world user, who is much more likely to use Windows/iOS or Windows/Android.
But the cross platform advantage means it get's recommended by the type of people that have cross platform needs to the type of people who don't. Would you rather hear, 'if you have an iPhone and a mac' or 'it just works.'
I think the opposite. If HN readers tastes' are similar to the average founder in the Valley, they are vastly more likely to use Macs and iPhones together than the average real world user, who is much more likely to use Windows/iOS or Windows/Android.